1.21 Update?

[HoboBIll]

Problem

Just tried this plugin out on my server and im having some issues (Server is on 1.21 paper). I know that 1.21 isn't officially supported so didn't really expect anything to work. But ironically if a totem is in a players hotbar the plugin will automatically use it. But if its in there inventory it doesn't register it and throws out this error:

Logs

[15:41:57 ERROR]: Could not pass event EntityDamageEvent to AutoTotem v1.0  
java.lang.NullPointerException: Cannot invoke "org.bukkit.inventory.ItemStack.getType()" because the return value of "org.bukkit.inventory.Inventory.getItem(int)" is null  
at AutoTotem-1.0.jar/systems.autototem.event.PlayerDeath.hasPlayerGotTotem(PlayerDeath.java:55) ~[AutoTotem-1.0.jar:?]  
at AutoTotem-1.0.jar/systems.autototem.event.PlayerDeath.onPlayerDamage(PlayerDeath.java:37) ~[AutoTotem-1.0.jar:?]  
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor15.execute(Unknown Source) ~[?:?]  
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:?]  
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:1.21-36-dd31654]  
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:?]  
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.21.jar:1.21-36-dd31654]  
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[paper-1.21.jar:1.21-36-dd31654]  
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:?]  
at org.bukkit.craftbukkit.event.CraftEventFactory.callEvent(CraftEventFactory.java:267) ~[paper-1.21.jar:1.21-36-dd31654]  
at org.bukkit.craftbukkit.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:1200) ~[paper-1.21.jar:1.21-36-dd31654]  
at org.bukkit.craftbukkit.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:1190) ~[paper-1.21.jar:1.21-36-dd31654]  
at org.bukkit.craftbukkit.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:1180) ~[paper-1.21.jar:1.21-36-dd31654]  
at org.bukkit.craftbukkit.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:1083) ~[paper-1.21.jar:1.21-36-dd31654]  
at org.bukkit.craftbukkit.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:1234) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.LivingEntity.actuallyHurt(LivingEntity.java:2280) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.player.Player.actuallyHurt(Player.java:1092) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.LivingEntity.hurt(LivingEntity.java:1476) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.player.Player.hurt(Player.java:1001) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.level.ServerPlayer.hurt(ServerPlayer.java:1204) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.LivingEntity.causeFallDamage(LivingEntity.java:2081) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.player.Player.causeFallDamage(Player.java:1736) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.level.block.Block.fallOn(Block.java:459) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.Entity.checkFallDamage(Entity.java:1732) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.world.entity.LivingEntity.checkFallDamage(LivingEntity.java:410) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.level.ServerPlayer.doCheckFallDamage(ServerPlayer.java:1648) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleMovePlayer(ServerGamePacketListenerImpl.java:1549) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.network.protocol.game.ServerboundMovePlayerPacket.handle(ServerboundMovePlayerPacket.java:34) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.network.protocol.game.ServerboundMovePlayerPacket$Pos.handle(ServerboundMovePlayerPacket.java:75) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:36) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:151) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1478) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:201) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:125) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1456) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1449) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:135) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1408) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1415) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1260) ~[paper-1.21.jar:1.21-36-dd31654]  
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:329) ~[paper-1.21.jar:1.21-36-dd31654]  
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

This is such a dope plugin and I look forward for its update!